Trifluoroethanol/N-Methylpyrrolidinone absorption heat pump for floor heating

Antonopoulos, KA; Rogdakis, ED

dc.contributor.author	Antonopoulos, KA	en
dc.contributor.author	Rogdakis, ED	en
dc.date.accessioned	2014-03-01T02:48:08Z
dc.date.available	2014-03-01T02:48:08Z
dc.date.issued	1992	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/33559
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0026962709&partnerID=40&md5=5c41c87f61f79ac32f6d468f67dec630	en
dc.subject.other	Energy conservation	en
dc.subject.other	Floors	en
dc.subject.other	Heat transfer	en
dc.subject.other	Mathematical models	en
dc.subject.other	Nomograms	en
dc.subject.other	Pipe	en
dc.subject.other	Refrigerants	en
dc.subject.other	Thermoanalysis	en
dc.subject.other	Thermodynamics	en
dc.subject.other	Absorption heat pump	en
dc.subject.other	Floor heating	en
dc.subject.other	N-Methylpyrrolidinone (NMP)	en
dc.subject.other	Trifluoroethanol (TFE)	en
dc.subject.other	Heat pump systems	en
dc.title	Trifluoroethanol/N-Methylpyrrolidinone absorption heat pump for floor heating	en
heal.type	conferenceItem	en
heal.publicationDate	1992	en
heal.abstract	A thermodynamic and thermal analysis is conducted for an energy system composed of a solar driven absorption heat pump using Trifluoroethanol (TFE) and N-Methylpyrrolidinone (NMP) as refrigerant and absorbent, respectively, and a floor heating unit composed of regularly spaced pipes imbedded in the floor of a building. Such systems may offer considerable energy savings because: (a) thermal comfort is obtained with lower temperatures owing to direct contact of people's feet with the heat source, (b) lower heating fluid temperatures are adequate owing to the available large heat exchange surfaces, and (c) heat storage within structural elements may decrease peak load. The analysis presented is based on developed analytic expressions for the thermodynamic properties of the TFE-NMP mixture in conjunction with a procedure which simulates the operation of the corresponding absorption heat pump and provides its exact thermodynamic cycle. The analysis is supplemented by a model which simulates the thermal behaviour of the floor containing the heating pipes. Predictions are presented for operation during the typical winter in the Athens area. Nomographs are also presented for selecting the floor pipe spacing which ensures best thermal matching between the floor and the heat pump. It is found that the theoretical heat gain factor varies from 150-170% and the maximum thermal power produced for 40°C mean floor temperature during November, January and March is 360, 250 and 500 W/m2-floor, respectively.	en
heal.publisher	Publ by ASME, New York, NY, United States	en
heal.journalName	American Society of Mechanical Engineers, Advanced Energy Systems Division (Publication) AES	en
dc.identifier.volume	27	en
dc.identifier.spage	309	en
dc.identifier.epage	314	en